Assurance is Abundant in the Understanding of the Gospel
Source: Nav
Colossians 2:2
that they may be encouraged in heart, knit together in love, and filled with the full riches of complete understanding, so that they may know the mystery of God, namely Christ,
1 Thessalonians 1:5
because our gospel came to you not only in word, but also in power, in the Holy Spirit, and with great conviction—just as you know we lived among you for your sake.